Experimental Study of the Aerosolization from a Carbon Nanotube Bulk by a Vortex Shaker
Table 6
Toxicology-objectives, contribution of this study and perspectives.
Objectives (cf.1)
Contribution of this study
Perspectives
Stability
The study of time monitoring of the mass concentration was instigated. The emission of matter seems to be concentrated over the first 15 (10) minutes.
The device must progress to achieve stability over several hours.
Repeatability
Establishment of the stability is a prerequisite. The standard deviation over the total carbon concentration was quantified.
It is necessary to seek to reduce the dispersion of results. The effort must relate to improving the total sampler, but also the suspension system.
Representativeness
The transformation of the powder observed upon increase in speed favours remaining within a moderate speed (1500 rpm). On the other hand, the stability is not established over time: discussion on the representativeness is therefore premature.
Generation must firstly be stabilised over time.
Choice of concentration
The influence of the geometry of the system has been demonstrated. Adjustment parameters are available: quantity of powder used, size of the test tube.
Once the generation is stabilised, these parameters will enable adjustment of the level of concentration. This adjustment will probably be specific to each type of powder.
